Update app.py

app.py

@@ -62,7 +62,7 @@ def get_description_text():
     return f"""
     # {TITLE}
 
-    This is an AutoGen playground built with [Panel](https://panel.holoviz.org/). You can use it to interact with the AutoGen agents. Scroll down to see the code for creating and using the agents.
+    This is a [YI-6B-200K](https://huggingface.co/01-ai/Yi-6B-200K) AGI + Agent Factory built with [Panel](https://panel.holoviz.org/). Build Agents that use YI-200K and avoid context window overflows! . Scroll down to see the code for creating and using the agents.
 
     #### [[AutoGen](https://github.com/microsoft/autogen)] [[Discord](https://discord.gg/pAbnFJrkgZ)] [[Paper](https://arxiv.org/abs/2308.08155)] [[SourceCode](https://github.com/thinkall/autogen-demos)]
     """
@@ -352,7 +352,7 @@ def init_groupchat(event, collection_name):
 
 async def agents_chat(init_sender, manager, contents, agents, RAG):
     # Check if a file is uploaded
-    if RAG.value:
+    if RAG and RAG.value:
         # Save the file and process it
         file_path = "path/to/saved/file"  # Define the path to save the uploaded file
         RAG.save(file_path)
@@ -360,7 +360,7 @@ async def agents_chat(init_sender, manager, contents, agents, RAG):
 
         # Prepend the extracted text to the contents
         contents = raw_text + ' ' + contents
-
+    
     # Determine the recipient
     recipient = (
         manager